Скачать или смотреть Troubleshooting glob.glob in Python: How to Get File Paths Successfully

Are you struggling with getting an empty list from Python's `glob.glob`? Discover why this happens and how to easily solve it with our step-by-step guide!
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This video is based on the question https://stackoverflow.com/q/62610284/ asked by the user 'Shorouk Adel' ( https://stackoverflow.com/u/7237926/ ) and on the answer https://stackoverflow.com/a/62610381/ provided by the user 'Red' ( https://stackoverflow.com/u/13552470/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting glob.glob in Python: How to Get File Paths Successfully

When working with file paths in Python, especially in a Jupyter Notebook, you may encounter issues where the glob.glob function returns an empty list. This frustrating situation often arises from incorrect path specifications. Let’s deep dive into the problem and explore effective solutions.

Understanding the Problem

You’re attempting to read specific file paths from a folder on your computer using the glob.glob function. However, you consistently receive an empty list as a result. This could happen for several reasons, primarily due to the way you specify the file paths in Windows environments.

Common Mistakes with Path Specifications

1. Improper Use of Backslashes

In Windows file paths, backslashes (\) are commonly used. However, in Python strings, a single backslash is treated as an escape character. For instance:

\n is interpreted as a newline.

\t is interpreted as a tab.

Therefore, if you use backslashes improperly, it may lead to incorrect path interpretations.

2. Path Typo or Incorrect Structure

Make sure that the folder structure you specified actually exists with the correct file types.

Solutions to Get the Desired Results

Use Double Backslashes

The most straightforward fix is to use double backslashes in your paths, which prevents them from being misinterpreted. Here's how you can modify your code:

[[See Video to Reveal this Text or Code Snippet]]

Use Raw String Literals

An alternative and often more readable solution is to use Python's raw string literals. This tells Python to treat backslashes as literal characters. You can define a raw string by prefixing the string with r:

[[See Video to Reveal this Text or Code Snippet]]

Recap and Best Practices

Always check your paths: Make sure that the directories and file types you are trying to access exist.

Use proper syntax: Remember to use double backslashes or raw string literals to avoid escape character issues.

Verbose error checking: Consider adding error checking or print statements to debug and confirm the paths being used.

By addressing these common pitfalls, you can effectively utilize glob.glob to retrieve your desired file paths from directories in Python, leading to smoother project implementations.

With this knowledge, you're now equipped to tackle any issues with retrieving file paths in your Python applications confidently!